Hallo, dies ist ein Test.

PWD: /www/data-lst1/unixsoft/unixsoft/kaempfer/.public_html

Running in File Mode
Relative path: ./../../../../../../usr/man/man3c/posix_fadvise.3c
Real path: /usr/share/man/man3c/posix_fadvise.3c
Zurück

'\" te .\" Copyright (c) 2001, the Institute of Electrical and Electronics Engineers, Inc. and The Open Group. All rights reserved. .\" Portions Copyright (c) 2008, Oracle and/or its affiliates. All rights reserved. .\" Oracle gratefully acknowledges The Open Group for permission to reproduce portions of its copyrighted documentation. Original documentation from The Open Group can be obtained online at http://www.opengroup.org/bookstore/. .\" The Institute of Electrical and Electronics Engineers and The Open Group, have given us permission to reprint portions of their documentation. In the following statement, the phrase "this text" refers to portions of the system documentation. Portions of this text are reprinted and reproduced in electronic form in the Sun OS Reference Manual, from IEEE Std 1003.1, 2004 Edition, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2004 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between these versions and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html. This notice shall appear on any product containing this material. .TH posix_fadvise 3C "14 Jul 2008" "Oracle Solaris 11.4" "Standard C Library Functions" .SH NAME posix_fadvise \- file advisory information .SH SYNOPSIS .LP .nf #include <fcntl.h> \fBint\fR \fBposix_fadvise\fR(\fBint\fR \fIfd\fR, \fBoff_t\fR \fIoffset\fR, \fBoff_t\fR \fIlen\fR, \fBint\fR \fIadvice\fR); .fi .SH DESCRIPTION .sp .LP The \fBposix_fadvise()\fR function advises the system on the expected behavior of the application with respect to the data in the file associated with the open file descriptor, \fIfd\fR, starting at \fIoffset\fR and continuing for \fIlen\fR bytes. The specified range need not currently exist in the file. If \fIlen\fR is zero, all data following offset is specified. The system may use this information to optimize handling of the specified data. The \fBposix_fadvise()\fR function has no effect on the semantics of other operations on the specified data, although it may affect the performance of other operations. .sp .LP The advice to be applied to the data is specified by the \fIadvice\fR parameter and may be one of the following values: .sp .ne 2 .mk .na \fB\fBPOSIX_FADV_NORMAL\fR\fR .ad .RS 25n .rt Specifies that the application has no advice to give on its behavior with respect to the specified data. It is the default characteristic if no advice is given for an open file. .RE .sp .ne 2 .mk .na \fB\fBPOSIX_FADV_SEQUENTIAL\fR\fR .ad .RS 25n .rt Specifies that the application expects to access the specified data sequentially from lower offsets to higher offsets. .RE .sp .ne 2 .mk .na \fB\fBPOSIX_FADV_RANDOM\fR\fR .ad .RS 25n .rt Specifies that the application expects to access the specified data in a random order. .RE .sp .ne 2 .mk .na \fB\fBPOSIX_FADV_WILLNEED\fR\fR .ad .RS 25n .rt Specifies that the application expects to access the specified data in the near future. .RE .sp .ne 2 .mk .na \fB\fBPOSIX_FADV_DONTNEED\fR\fR .ad .RS 25n .rt Specifies that the application expects that it will not access the specified data in the near future. .RE .sp .ne 2 .mk .na \fB\fBPOSIX_FADV_NOREUSE\fR\fR .ad .RS 25n .rt Specifies that the application expects to access the specified data once and then not reuse it thereafter. .RE .sp .LP These values are defined in \fB<fcntl.h>\fR .SH RETURN VALUES .sp .LP Upon successful completion, \fBposix_fadvise()\fR returns zero. Otherwise, an error number is returned to indicate the error. .SH ERRORS .sp .LP The \fBposix_fadvise()\fR function will fail if: .sp .ne 2 .mk .na \fB\fBEBADF\fR\fR .ad .RS 10n .rt The \fIfd\fR argument is not a valid file descriptor. .RE .sp .ne 2 .mk .na \fB\fBEINVAL\fR\fR .ad .RS 10n .rt The value of \fIadvice\fR is invalid, or the value of \fIlen\fR is less than zero. .RE .sp .ne 2 .mk .na \fB\fBESPIPE\fR\fR .ad .RS 10n .rt The \fIfd\fR argument is associated with a pipe or FIFO. .RE .SH USAGE .sp .LP The \fBposix_fadvise()\fR function has a transitional interface for 64-bit file offsets. See \fBlf64\fR(7). .SH ATTRIBUTES .sp .LP See \fBattributes\fR(7) for descriptions of the following attributes: .sp .TS tab( ) box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) . ATTRIBUTE TYPE ATTRIBUTE VALUE _ Interface Stability Committed _ MT-Level MT-Safe _ Standard See \fBstandards\fR(7). .TE .sp .SH SEE ALSO .sp .LP \fBposix_madvise\fR(3C), \fBattributes\fR(7), \fBstandards\fR(7)